Device for sinking foundation-tubes.



H. G. HAASE.

DEVICE FOR SINKING FOUNDATION TUBES.

I APPLICATION FILED SEPT. 4. 19:4.

Fig. 2

Fig, l 2 1 Q Q s. 46

\ mmwzb K @mf/ TES m ws AND

eert-un ore nd sink oundutn rantings which Specifictttibn of Letters Patent.

PATENT memes;

MINNESOTAs AS SIGNO R OF ONE-HALF TO Nita-HALF .TO HENRY SLETTEN. BOTH 0F MINNE- INKING FOUNDATION-TUBES,

Patented Mar. 2!, 19115;

ed attem t; 19114. "serial No. 860,180.

:nul to the Iuwur sectien of: the foundation tube .1. worm gear is secured to the uppereml Of theshatt l0 and isndupted to be; driven by :1 motor and other connecw The \vm'in gem 2!) Meshes with :l worm 1i) ft 16 nftlmelectrie motor L"). The said pzrrts 15.16. 17, 1S and 19 are diugrium umtieultv indicated in Fig. lrund they are @(mpuntlwl in suitablehearings ufl'urded by an extended portion nfthe frame 1' so far as this invention is concerned, however, the shaft 105' may he rotated hyany suitable means. "lhe shafttlfl i'sprevided with through the ungularhore of :t; ;hub -15, the iiunge uf which is rigidly secured to a. retaining eoflnr AE, The ungular pui'tion of the shaft] 10 also depends into, but is free from a tubular supplemental shaft 47 having at flanged upper end that. is swiveled in the retaining collar ith At its lower end, the supplementail hearing shaft 4Tis1n'0yided \vith rudi altarins Drilling toolsor- Chisels -19 are piyoted to the or chisels 50 secured to and depending from the: mtermedmte portmns 0t stud arms.

hemh h? will also bepositivelv rotated, and the supplementnl shaft 47 and arms 48 will also bewaused to fi'otat e byl frictional engugegn'ent between the same and the retaining (3011111746, uutthe movement thereofwill not be nositiveend there will be more or less slippage, one way or the ether so that the Chisels will not exactly repeateperm "Ttiens on successive rotations.

I'Tnder the above noted rotatitm of supplemental shaft 4'7 un arm'sAB, they will be intermittentlyraised and then viofollowi ng device. gurrouuding the shaft verse barsef the frame 14 and acollar '51 bearing When the boring shaft 10 is rotutedgythe lently thrust downward by means of the Aitand compressed between one of thetra ns tinus, n'eferuhlr applied on the frame 14.

u depending rectangular portion that works outer ends of the arms 4:8, and drilliugtools on the said-shaft 47, is a heavy coiled spring the worm stand shaft 1Q are rotated, the arms 47 and the chisels or excavating tools "carried thereby will be rotated and repeatedly raised y the cams 54-.55' and then released "and violently thrust-downward by the spring 52.1 The repetition of these actions will cause the excavating toolto' work I conveyer used ;in connection.with the eonits way through hardpan clay, rave or even rock. T e loosened materia s will be taken up, elevated'and carried away by the conveyer 22'.23, which conveyer'is the same struction above described;

What I claim'is: n 1. The combination with a foundation tube, of a framework secured within. the,

same, 'a rotary boring toolsupported; by said frame and working below said tube,

mechanical devices serving to positively raise and lower said boring tool underrotation thereof, and a motor hav1ng'connections .for positively rotating said boring tool.

2. The combination with a foundation 25 tube, of a framework secured within and to the lower portion thereof, a boring tool supported by said frame and wor ing below said tube, a spring for thrusting said boring tool downward, cooperating cams for ntermittentlyralslng'and releasing said' boring tool under rotation thereof, and a 7 motor on said frame having connections for rotating said boring tool.

3. The-combination with thefoundation tube, of a boring frame detaeliably applied to the lower portion thereof, a motor on said frame, a "boring tool mounted on said frame and working below said tube, a

spring yieldinglv forcing said borin'g tool downward, cams for intermittentlyraising 40 and releasing said boring tool, and connections from said motor forv rotating said bor ing tool. I

In testimony whereof I afiix my signa ture in presence of two witnesses.

"HERMAN G. HAASE.

W'itnesses:

ALICE L. KING, I'IARRY D. K1130121 1 

